Charge sharing calibration method and system

Abstract

A signal processing system (SPS) and related method. The system comprises an input interface (IN) for receiving at least two data sets, comprising a first data set and second data set. The first data set is generated by an X-ray detector sub-system (XDS) at a first pixel size and the second data set generated at a second pixel size different from the first pixel size. An estimator (EST) is configured to compute, based on the two data sets, an estimate of a charge sharing impact.

The invention claimed is: 
     
       1. An imaging arrangement, comprising:
 an X-ray imaging apparatus comprising a detector sub-system, the detector sub-system having a native pixel size; 
 a signal processing system comprising:
 a combiner configured to combine signals generated at the detector sub-system in response to X-radiation exposure and obtain at least one of a first data set and a second data set, wherein a pixel size in one of the first and second data sets is the native pixel size and in the other data set is a multiple of the said native pixel size; 
 an estimator configured to compute, based on the two data sets, an estimate of a charge sharing impact by functional model comprising a correction factor; and 
 a corrector configured to correct, for the charge sharing impact and based on the estimate, a third data set generated by the detector-subsystem or another detector. 
 
 
     
     
       2. The imaging arrangement of  claim 1 , wherein the combiner includes binning circuitry to bin the signals generated at the X-ray detector sub-system. 
     
     
       3. The imaging arrangement as per  claim 1 , wherein the estimator is configured to form the correction factor by forming one or more ratios based on values as per the first and second data set to obtain said estimate. 
     
     
       4. The imaging arrangement as per  claim 1 , wherein the detector sub-system is an energy resolving type. 
     
     
       5. A signal processing method, comprising:
 combining signals generated by a detector sub-system having a native pixel size in response to X-radiation exposure, to obtain at least one of a first data set and a second data set, wherein a pixel size in one of the first and second data sets is the native pixel size and in the other data set is a multiple of the said native pixel size; 
 computing, based on the two data sets, an estimate of a charge sharing impact impact by means of a functional model comprising a correction factor; and 
 based on the estimate, correcting, for the charge sharing impact, a third data set generated by the detector sub-system or by another detector sub-system. 
 
     
     
       6. A non-transitory computer-readable medium having executable instructions stored thereon which, when executed by at least one processor, cause the at least one processor to perform a signal processing method comprising:
 combining signals generated by a detector sub-system) having a native pixel size in response to X-radiation exposure, to obtain at least one of a first data set and a second data set, wherein a pixel size in one of the first and second data sets is the native pixel size and in the other data set is a multiple of the said native pixel size; 
 computing, based on the two data sets, an estimate of a charge sharing impact impact by means of a functional model comprising a correction factor; and 
 based on the estimate, correcting, for the charge sharing impact, a third data set generated by the detector sub-system or by another detector sub-system.